On 16.03.23 21:14, Peter Zijlstra wrote:
On Wed, Mar 08, 2023 at 04:42:10PM +0100, Juergen Gross wrote:
+DEFINE_PARAVIRT_ASM(pv_native_irq_disable, "cli", .text);
+DEFINE_PARAVIRT_ASM(pv_native_irq_enable, "sti", .text);
+DEFINE_PARAVIRT_ASM(pv_native_read_cr2, "mov %cr2, %rax", .text);
per
On Wed, Mar 08, 2023 at 04:42:10PM +0100, Juergen Gross wrote:
> +DEFINE_PARAVIRT_ASM(pv_native_irq_disable, "cli", .text);
> +DEFINE_PARAVIRT_ASM(pv_native_irq_enable, "sti", .text);
> +DEFINE_PARAVIRT_ASM(pv_native_read_cr2, "mov %cr2, %rax", .text);
per these v, the above ^ should be in
On Wed, Mar 08, 2023 at 04:42:10PM +0100, Juergen Gross wrote:
> All functions referenced via __PV_IS_CALLEE_SAVE() need to be assembler
> functions, as those functions calls are hidden from gcc. In case the
> kernel is compiled with "-fzero-call-used-regs" the compiler will
> clobber caller-saved
On Fri, Mar 10, 2023 at 07:24:17AM +0100, Juergen Gross wrote:
> The "normal" cases not using alternatives should rather be switched to
> static calls.
Or that.
> Whether it is possible to mix a static call with alternatives needs to
> be evaluated.
I'd prefer not to mix them. Either should be
On 09.03.23 14:39, Borislav Petkov wrote:
On Wed, Mar 08, 2023 at 04:42:10PM +0100, Juergen Gross wrote:
All functions referenced via __PV_IS_CALLEE_SAVE() need to be assembler
functions, as those functions calls are hidden from gcc. In case the
kernel is compiled with "-fzero-call-used-regs"
On Wed, Mar 08, 2023 at 04:42:10PM +0100, Juergen Gross wrote:
> All functions referenced via __PV_IS_CALLEE_SAVE() need to be assembler
> functions, as those functions calls are hidden from gcc. In case the
> kernel is compiled with "-fzero-call-used-regs" the compiler will
> clobber caller-saved
